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View Full Version : Transmission Leaking Fluid and Smoking


chriswm
02-12-2010, 09:58 AM
Hi There,

I have a '94 C280 that's leaking some transmission fluid, and it's landing on the exhaust pipe. It makes white smoke come up from the sides of the car when I'm at a stop light, especially on a warm day after driving on the freeway.

Ahwile ago I recall reading a thread that talked about a sensor or something that is really common for leaking like this, and just needs to have the o-ring replaced, and is like a 10 minute job. I searched for a couple hours through the forums and couldn't find it. Could you please point me to that thread, or remind me what the part is that's leaking?

Cheers,
Chris
1995c280
02-12-2010, 02:33 PM
that only applies to transmissions 97 & up which are electronically controlled. 94-96 is a totally different transmission which does not have that sensor. if you have a tranny leak i would have the tranny pan gasket checked. another possibility could be the tranny output shaft/tailshaft seal or the front pump seal. also check the seal rings for the tranny cooler lines.
JRE320
02-13-2010, 09:35 AM
Just take it to a independent mercedes shop and let then check on it. I don't think that you would be able to know what to replace.
chriswm
02-16-2010, 09:23 PM
Originally posted by JRE320
Just take it to a independent mercedes shop and let then check on it. I don't think that you would be able to know what to replace.

While I appreciate your suggestion, I'd like to avoid the cost of taking it to a shop if at all possible, which is why I asked the question in the forums. :banana:
JRE320
02-17-2010, 09:08 AM
The cost of asking question in the forum is free but all the answer can cost you more in the end.
1995c280
02-17-2010, 10:08 AM
Originally posted by JRE320
The cost of asking question in the forum is free but all the answer can cost you more in the end.

+1

i wouldn't wait on this. if you see/smell tranny fluid you have a noticeable leak and by prolonging this, you are just asking for a transmission failure of some sort in the future.
Cru328prod
02-26-2010, 02:35 AM
lmfao i had this problem before....if you floored it it just blowed smoke in who evers face thats behind you....turned out to be the main shaft seal on the tranny.......its like a 20 dollar part with like 4hr labor

I remember you have to also pull the exhaust off to get to it